Physics Set 2 FAQs

1. The earth wire in a house is connected to:

2. In the troposphere, temperature decreases with height at about:

3. The time period of a simple pendulum of length 0.25 m at g = 9.8 m s⁻² is approximately:

4. A sheet 0.2 mm thick is made of atoms of diameter about 10⁻¹⁰ m stacked in a line. The approximate number of atoms across its thickness is:

5. When white light passes through a glass prism, the colour that bends the most is:

6. A device used to change the resistance in an electric circuit without changing the voltage source is called a:

7. Which of the following is a Class II lever?

8. Consider the following statements about an inclined plane: (I) For the same height, a longer plane requires a smaller effort. (II) The work done on the load decreases as the plane becomes longer. (III) Its mechanical advantage is greater than 1. Which of the above is/are correct?

9. Electromagnetic waves travel in vacuum with a speed of:

10. In an Amant calendar, the month ends on the:

11. Kerosene is optically denser than water because it has a higher:

12. Average velocity is the average rate of change of:

13. Ice stupas, used to conserve water for the spring and summer, are made in:

14. A fuse protects a circuit by melting due to:

15. The mercury barometer was devised by the Italian scientist:

16. The dimensional formula of force is:

17. The straight line passing through the pole and the centre of curvature of a spherical mirror is called its:

18. For resistors connected in parallel, the reciprocal of the equivalent resistance is equal to the:

19. M. K. Vainu Bappu is known as the:

20. According to the Bohr–Bury rule, the maximum number of electrons in the M shell is:

21. The changing shapes of the bright portion of the Moon as seen from the Earth are called:

22. The value of the solar constant is approximately:

23. The gravitational potential at a point due to the Earth is defined as the potential energy of:

24. For a satellite in a circular orbit around the Earth, as the height above the surface increases, the orbital speed:

25. Convection is possible only in:

26. The Foucault pendulum gave the first simple demonstration of the Earth's:

27. The kinetic energy of an object of mass m moving with velocity v is:

28. Alphabetic symbols of elements derived from their Latin names were suggested in 1813 by:

29. The mass of a proton in unified atomic mass units is approximately:

30. A simple pendulum has a period of 2 s on the Earth. At a place where g is one-fourth of that on the Earth, its period will be: